Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 311d975868e562b5ee1cb5ba89f6829bbd1239bc75c86cd18ab0cfc8c6919773:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^